In this type of inter specific interactions the organisms are involved in co-evolution

In many cases of mutualism, the organisms involved do undergo co-evolution. Mutualism is a type of symbiotic relationship in which both species benefit from interaction. This mutual benefit often leads to a close and interdependent relationship between the species over evolutionary time. Co-evolution occurs when two or more species exert selective pressures on each other, leading to reciprocal adaptations. In mutualistic relationships, these adaptations can enhance the efficiency of the mutualistic interaction and increase the fitness of both species involved.

For example, in the mutualistic relationship between flowering plants and their pollinators (such as bees, birds, and butterflies), the plants may evolve traits such as brightly colored flowers and sweet nectar to attract pollinators, while the pollinators may evolve specialized mouthparts or behaviors to efficiently collect nectar and pollen from the flowers. Over time, these adaptations in both plants and pollinators can drive co-evolutionary changes that further enhance the mutualistic relationship.